You searched for: “ventriloquizing
ventriloquize (verb), ventriloquizes; ventriloquized; ventriloquizing
1. To make vocal sounds and utterances that seemingly come from a source other than the speaker: Basil ventriloquized in his room at home using a stuffed animal and a puppet.
2. To speak like or as an entertainer whose dummy talks by using the actor's own voice: At school, James attended an extracurricular activity to learn how to perform with a wooden puppet and ventriloquize by projecting his voice into it.